From 4e7324e062d6bdd31de857130d57f1380c048076 Mon Sep 17 00:00:00 2001
From: tengge1 <930372551@qq.com>
Date: Tue, 15 Jan 2019 11:55:50 +0800
Subject: [PATCH] Update Vector3.cs
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修复bug。
---
 THREE/Math/Vector3.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/THREE/Math/Vector3.cs b/THREE/Math/Vector3.cs
index 3cbe7633..42a19678 100644
--- a/THREE/Math/Vector3.cs
+++ b/THREE/Math/Vector3.cs
@@ -521,7 +521,7 @@ namespace THREE
             var theta = this.Dot(v) / (_Math.Sqrt(this.LengthSq() * v.LengthSq()));
 
             // clamp, to handle numerical problems
-            return _Math.Cos(Math.Clamp(theta, -1, 1));
+            return _Math.Acos(Math.Clamp(theta, -1, 1));
         }
 
         public double DistanceTo(Vector3 v)